OutKast’s Big Boi, Morrissey and Counting Crows will grace Chicago’s House of Blues next month as part of American Express’ Blue Jam Sessions. Net proceeds from the July 15-17 shows will benefit music education programs in Chicago-area public schools. Big Boi and Sleepy Brown will perform on July 15, followed by Counting Crows, the Graham Colton Band and Jem on July 16. Morrissey will headline on July 17. American Express cardholders can purchase tickets beginning Sunday (June 27) for $55. Local fans can also win admission via radio station contests, while Westwood One/Premiere Radio Network will sponsor national contests for trips to Chicago and tickets. Morrissey’s schedule was jolted with this morning’s cancellation of the Lollapalooza tour, which he was to headline beginning July 14 in Auburn, Wash. A spokesperson had no information about possible further North American appearances this summer.